CONTROLLING A LIQUID FLOW THROUGH HEATER

专利名称：CONTROLLING A LIQUID FLOW THROUGH

HEATER

发明人：MULDER, Bernardo, A.申请号：EP08709982.6申请日：20080211公开号：EP2112897A2公开日：20091104

摘要：A liquid flow through heater for heating a liquid (10) comprises a channel (4)and an electric heater element (50) for heating at least a portion of the channel (4). Atemperature sense unit (6, 60) senses a temperature (ST1; ST1, ST2) indicative of thetemperature of the liquid. A flow control means (3) controls a flow of the liquid (10)through the channel (4). A controller (7) controls in a first phase (PH1), (i)the electricheater element (50) to pre-heat at least the portion of the channel (4), and (ii) the flowcontrol means (3) to obtain a rate of flow ofthe liquid (10 through the channel (4) which iszero or relatively small withrespect to a rate of flowduring a second and/or third phase.The controller (7) controls in thesecond phase (PH2) succeeding the first phase (PH1), (i)the electric heater element (50) to supplya predetermined heating power independenton the sensed temperature (ST1; ST1, ST2),and (ii) the flow control means (3) to obtain aflow of the liquid (10) through the channel (4), and in thethird phase (PH3) succeeding thesecond phase (PH2), (i) the electric heater element (50) to supply a heating power (HP) independence on the sensed temperature (ST1; ST1, ST2) to substantially stabilize thesensed temperature (ST1; ST1, ST2) on a desired target value (TV), and (ii) the flowcontrol means (3) to obtain a flow of the liquid (10) through the channel (4).

申请人：Koninklijke Philips Electronics N.V.

地址：Groenewoudseweg 1 5621 BA Eindhoven NL

国籍：NL

代理机构：Uittenbogaard, Frank

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